Cocktail shaker



FIG. 1 is a top perspective view of a cocktail shaker, showing our new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the drawing views represent unclaimed portions of a cocktail shaker, which are included for the purpose of illustrating unclaimed environment only, and form no part of the claimed design. 

CLAIM The ornamental design for a cocktail shaker, as shown and described. 